I upgraded to Lightroom CC on release and recently did the latest update. Now my radial filter is not showing in the work area. I can activate it in the selective adjustments panel, but there is no guidelines showing the size/shape of the mask. The mask shows when I check/uncheck the Show Mask Overlay box or hit "O" (keyboard shortcut), but still no guidelines. Radial filter shows in the history panel as well. The selective paintbrush appears to be working normally. I'm on a 2013 IMac using OSX 10.10.2. I have quit and restarted Lightroom CC as well as rebooted my machine. I do not have this issue on my MacBook Pro which was updated at the same time.
Duh. Pins Hidden. Rookie mistake. Thanks!